Electric lock.

The invention relates to a lock for a motor vehicle door, with a locking pin which is gripped by a fork latch which snaps in the closed position in a closing lever.

From DE-OS 21 44 065 a lock for a motor vehicle door is known in which the bolt is actuated by an electromagnet. This lock requires numerous mechanical parts in the form of levers and linkages, so that a high manufacturing and assembly cost arises. Furthermore, these mechanical parts are a source of rattling noises due to vibrations of the automobile. Also this castle built tall and has a considerable weight. Furthermore, it is necessary that the door is closed it must be added. In this way a large noise is generated.

Object of Erfindunq is to improve a lock of the above-mentioned type ge such that it no or only minimal mechanical manual operation required and both open and the closing of the door is electrically controllable.

This object is achieved in that forked latch and locking lever are driven about its axis of rotation in each case by an electric motor.

Such lock requires for opening, closing and locking the door no mechanical actuation of handles manually. It alone will easily leave the door lock, after which the door automatically suffers some himself. This also eliminates the need to slam the door, so that the closing of a motor vehicle door does not generate noise. There is a high level of user comfort.

The castle is small in size and has a low weight and is of high reliability. The lock can be controlled solely electrically and also electronically at little technical effort.

is proposed for automatic locking of the door, that the fork bolt is motorized in the closing direction. A safe operation and automatic closing of the door, without pressing an electric switch is achieved by the fork case the first detent position (pre-locked position) by closing the door and the second detent position (primary position) achieved by the motor drive.

For optimum fork case with the door open gets into the position in which they can receive the locking pins, it is proposed that the bifurcated latch is spring-loaded in the opening direction of rotation.

In the periods in which the fork member is not operated by motor, it is free to move up to the resilient rotary loading. For this purpose, it is proposed that the bifurcated latch is driven in the closing direction by a rotatable cam or eccentric that is driven by a motor. The cam or eccentric drives the fork case only on when operated for actuating the fork case the engine. A motor controlling the fork case only in the appropriate rotational position of this is achieved in that the fork member having an edge portion through which an electrical switch is actuated, at least in the first locking position.

It is preferably proposed that the locking lever is driven by a motor in a direction of movement, in which the forked latch is unlatched. This is a simple way to open the door by electrical actuation possible. Here, the locking lever can be spring-loaded to the locking position toward.

In order to also hold the locking lever as it is not driven, freely movable, it is proposed that the closing lever in entrastender direction is driven by a rotary eccentric or cam, which is motor-driven. In this case may be operable to be controlled by at least one of the cam or eccentric, a switch.

It is preferably proposed that forked latch and locking lever are driven by the same motor, in particular electric motor. A single motor leads to a particularly small-sized lock and lightweight. A particularly simple electrical control is achieved in that the bifurcated latch and is driven in the second direction of rotation of the lock lever in a first direction of rotation of the motor. Only a change of the direction of rotation sufficient to obtain different functions.

It is further proposed that the output shaft of the motor drives via a first overrunning the closing lever and a second freewheeling fork case in particular on cam or eccentric, wherein the coupling-off directions of rotation of both clutches are opposite to each other. Such an arrangement of freewheels results in a particularly simple transmission of high robustness and reliability.

It is also proposed that at least one reduction gearing is arranged between the engine output shaft and the freewheels. It can also be arranged between the freewheel and the fork member and the locking lever respectively a reduction gearing. A small size and excellent reliability is achieved in that at least one of the gear is a planetary gear. An optimal distribution of forces and a safe closing of the door by the fork bolt is achieved by the reduction ratio of the transmission between motor and fork case is greater than the Untersetzunqsverhältnis between motor and closing lever.

An embodiment of the invention is shown in the drawings and will be described in more detail below. Show it:<ul><li>FIG. 1 is a side view of the castle;</li><li>Figure 2 is a section CD in Fig. 1.</li><li>3 shows a section according to LM in Fig. 1.</li><li>4 shows a section according to IK in Fig. 1.</li><li>5 shows a section according to GH in Fig. 1.</li><li>6 shows a section according to AB in Fig. 1.</li><li>7 shows a section according to EF in FIG. 1. and</li><li>Fig. 8 is a circuit diagram.</li></ul>

On the front side of a vehicle door not shown, a male lock is attached, the housing 1 has a horizontal slot 3 which in the vertical outer housing wall 2 having a locking pin 4 receives at closing of the door, which can be attached to the spar of an automobile. When closing the door, the pin penetrates 4 into the slot 5 of a fork latch 6, which is mounted rotatably about an axis parallel to the horizontal axis pin 7th The forked latch 6 is brought by the pin 4 in a first pre-locking position (not shown) in which a forked latch disposed on the locking lever 8 engages behind a tooth-shaped projection of the fork V trap. The becomes effective surface of said tooth-shaped projection is V aebildet from a side wall of the slot. 5

Once the fork bolt 6 has reached the pre-locked position, the fork bolt is motorized by a cam D₂ further rotated until the locking lever 8 behind a tooth-shaped projection engages H. This rotational movement of the fork member 6 against the pressure of a torsion spring 9 from the pre-locked position V to the primary position H is not normally by the pin 4, but by rotation of the cam D₂ generated, which so far is rotating in the pre-locked position in a recess 9 of the plate-shaped fork member 6 until the cams, radial surface 10 reaches the recess, which projects so far that during the further rotation of the cam D₂ the fork bolt is 6 rotated in the opposite direction of rotation to the cam against the force of the torsion spring 11, to the primary position is reached. The fork is the case even somewhat beyond rotated to ensure a secure engagement of the locking lever 8 at H. Cam D 2and recess 9 with surface 10 to work with it like a wheel with a single projection or tooth which engages a single projection of a second wheel engages in one recess of a second wheel or.

In the same manner, the lock lever 8 is actuated, in which an eccentric d₂ motor driven to rotate to actuate a projection 12 on the locking lever and thus to raise the locking lever. This causes the stop of the fork case is solved in the primary position or in the pre-locked position, and the door does not open or opens.

Both eccentrics or cams D₂ and d₂ are driven via gears by the same electric motor M. The speed reduction ratio from the motor to the cam D₂ is as great as the reduction ratio from the motor to the cam d about twice_{2 '} since D by the operation of the cam₂, And thus the fork latch 6, a closing the door from the pre-locked position to the primary position is reached and this closing aid a larger torque requires the actuation of the locking lever 8, which must be moved with his nose 8a from the region of the fork case. 6

The axes of all rotating moving parts in the housing 1 of the _Außenschlosses, as well as the axes of the in inner lock parts are arranged to the locking pin 4 in parallel and horizontally in the direction of travel of the motor vehicle and to each other. To a first translation of the rotation of the motor is on this, a first planetary gear 13 is secured (FIG. 4) whose output shaft 14 has a first freewheel 15 transmits the over multiple step-down gears b, c₁, c₂₁ d₁ the cam d₂ drives. Rotation of the output shaft 14 in the arrow direction P results in a rotation of the cam in the direction P₁, In this direction of rotation P of the first freewheel 15 engage so that the cam d₂ is actuated. By contrast, a second freewheel 16 is disengaged by this direction of rotation, so that the dogs D2 resting.

If the output shaft 14 is rotated counter to the direction of the arrow P by the motor M, the first freewheel 15 is disengaged and betätiqt by the output shaft 14, a second planetary gear 17th This includes B-on an inner sun gear A and three planetary gears which mesh with the internal toothing of a surrounding gear rim C and are mounted on a cage D, which, on an axial projection, in which the output shaft 14 runs freely, bears the second freewheel 16 whose coupling rotational direction opposite to the coupling-off direction of rotation of the first freewheel 15th

On the second freewheel 16 sits a pinion 18, through the gear D₁ stocky cam D₂ drives. If the output shaft 14 against the Pfeilrichtunq P rotated by the motor via the planetary gear 13, so there is a rotation of the cam D₂ in the direction of arrow P₂,

The engine is thus drivable in both directions of rotation, where on rotation of the shaft 14 in the direction of arrow P, a first engagement of the free wheel and thus a rotation of the cam d₂ towards P₁ created to raise the locking lever 8 around the nose 8a to allow the fork latch 6 release. This direction of rotation thus produces a open the door. Here, the second freewheel 16 remains disengaged, so that the cam D₂ resting.

In the reverse direction of the output shaft 14 of the first freewheel 15 will disengage, and the second freewheel 16 a, so that the cam D₂ in the direction of arrow P₂ rotates and the fork member 6 in the direction of arrow P₃ actuated to draw the locking pin 4 in the slot 3 or zoom to pull the outer castle to the pin 4 and thus to close the door.

In certain positions of the cams or eccentrics D₂, d₂ and the forked latch 6 are actuated microswitch I, II and III, which are arranged in an electrical circuit for driving the motor in both directions of rotation. This circuit is shown in Figure 8 and the following operation.:<ul><li>With the door closed, first the microswitch IV (changeover) by means of the actuating element (handle) is pressed on the outer door or -innenseite. Characterized the current circuit is closed in such a way to the engine, that a rotational direction for driving the cam d₂ is achieved. After reaching the unlocking position of the locking lever 8 via the cam d₂ an interruption of the circuit by actuation of the microswitch III. After releasing the handle of the circuit is closed via the switch IV again, and the engine operates the cam d₂to the starting position. In this position, the switch is again actuated III and the current flow is interrupted to the motor. If 8 opened the door after unlocking the lever, the microswitch switches I and outputs momentarily current to the motor (pole reversal against door opening function gives Drehsinn- change). After a minor rotation of the cam D₂ the microswitch II is actuated and interrupted the circuit again. In subsequent closing of door in pre-locked position by turning the fork latch 6 a switch-over of the microswitch I. The circuit is closed. The motor rotates the cam D₂ and thus draws the forked latch in primary position. Once the cam D₂ the micro-switch II operated, the current circuit is interrupted again. A bistable relay - eg controlled via door light contact - preventing faulty operation of the circuits. Not shown diodes are provided as protection against incorrect operations in the circuit.</li></ul>